Rhea's Terminator (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)

Caption NASA:"The Cassini Spacecraft captured this High-Resolution view of the Cratered Surface of Saturn's moon Rhea as the Spacecraft flew by this Celestial Body on October 17, 2010.
This view is centered on highly Cratered Terrain located at approx. 60° North Lat. and 251° West Long.

The image was taken in Visible Light with the Cassini Spacecraft narrow-angle camera. The view was acquired at a distance of approx. 40.000 Km(such as about 25.000 miles) from Rhea and at a Sun-Rhea-Spacecraft, or Phase, Angle of 88°.
Image scale is roughly 238 meters (781 feet) per pixel".